I am new to all this but I have a 2001 honda civic this morning it was coldest yet this year but I put oil in my car and when I drove off noticed it did not have power at all I mean it drove but when I accelerated it would make a rattle noise just for a couple seconds and I noticed white smoke in exhaust I'm scared my car is messed up help please lol I have no clue what I'm doing!!! It cranks fine but my check engine light is on and I just hope my car isn't shot!